Triple Higgs Coupling as a Probe of the Twin-Peak Scenario

TL;DR

This paper explores how the triple Higgs coupling can be used to identify and distinguish the twin-peak scenario near 125 GeV at LHC and future colliders, providing criteria to rule it out.

Contribution

It demonstrates the importance of triple Higgs couplings in detecting the twin-peak scenario and proposes a criterion to exclude this scenario based on collider data.

Findings

Triple Higgs couplings are crucial for identifying the twin-peak scenario.

The scenario can be distinguished from Standard Model extensions by its effects on the triple Higgs coupling.

A criterion is proposed to rule out the twin-peak scenario using collider measurements.

Abstract

In this letter, we investigate the case of a twin peak around the observed 125 GeV scalar resonance, using di-Higgs production processes at both LHC and $e^{+}e^{-}$ Linear Colliders. We have shown that both at LHC and Linear Collider the triple Higgs couplings play an important role to identify this scenario; and also that this scenario can be distinguishable from any Standard Model extension by extra massive particles which might modify the triple Higgs coupling. We also introduce a criterion that can be used to ruled out the twin peak scenario.